Engine Sub Harness (Injector/Ignition) - 2011 528i E90

The BMW engine sub harness for injector and ignition circuits on N52-powered platforms routes critical signals to the six ignition coils and fuel injectors mounted atop the valve cover. For the 2011 F10 528i equipped with the N52B30O1 (240hp) engine, primary replacements include BMW part numbers 12517565284 and its updated supersession 12517646145. This harness exhibits broad interchange across the N52 family spanning 2006-2016, covering E90 328i, E82 128i, and F10 528i models, though verification of the DME connector configuration is essential when crossing between early N52 (230hp) and N52N (240hp) variants. Common failures manifest as brittle wire insulation near cylinder 6 and corrosion at the 12-pin DME connector. When sourcing from salvage yards, inspect the injector connectors for heat damage and verify the presence of all six coil connectors, as the 12517565284 design utilizes a single molded unit. Installation requires removal of the cabin filter housing and careful routing behind the fuel rail to prevent chafing. Always compare mounting bracket positions, as 2009+ production modified the clip spacing to accommodate updated valve cover designs.